kernel panic 2-3 times per day, every day since Catalina 10.15.3
Since upgrading from 10.15.2 to 10.15.3 the kernel panics have gone from once every week or 2 to 2-3 per day, every day. And I'm not using my iMac heavily at all. Often it panics overnight while it should be mainly idle.
All panic messages reference the IO Subsystem , SCSCI and/or USB.